Scsi hard-drive cabling guidelines, Non-raid configurations, Raid configurations – Dell PowerEdge 6850 User Manual
Page 82
SCSI Hard-Drive Cabling Guidelines
Non-RAID Configurations
For a system without an optional RAID controller installed, connect SCSI channel A on the system board to connector SCSI A on the SCSI backplane board. If
the optional external SCSI cable is installed, connect it to SCSI channel B on the system board.
RAID Configurations
If the optional ROMB controller is enabled, or an optional RAID controller card is installed, you can configure the hard drives for RAID operation. The general
cabling configurations for various system options are discussed in the following subsections. For details on drive requirements for specific RAID types, see your
RAID controller documentation.
1+5 Drive Configuration
For a 1+5 drive configuration, connect SCSI channel A on the system board (see
Figure A
-4
) or SCSI channel A on the optional RAID card to connector SCSI A
on the 1+5 backplane (see
Figure A
-5
). Drive 0 functions as the boot drive.
2+3 Split Backplane Configurations
l
To use the optional integrated ROMB controller in a split 2+3 backplane configuration:
¡
Connect SCSI channel A on the system board (see
Figure A
-3
) to connector SCSI A on the SCSI backplane (see
Figure A
-5
). This channel controls
the boot drive (drive 0) and drives 1 and 2.
¡
Connect SCSI channel B on the system board (see
Figure A
-3
) to connector SCSI B on the SCSI backplane (see
Figure A
-5
). This channel controls
drives 3 and 4.
l
To use an optional RAID controller card in a split 2+3 backplane configuration:
¡
Connect SCSI channel A (channel 0) on the controller card to connector SCSI A on the SCSI backplane (see
Figure A
-5
). This channel controls the
boot drive (drive 0) and drives 1 and 2.
¡
Connect SCSI channel B (channel 1) on the controller card to connector SCSI B on the SCSI backplane (see
Figure A
-5
). This channel controls
drives 3 and 4.
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NOTICE:
An optional daughter card must be installed on the back of the 1+5 SCSI backplane to support split 2+3 backplane operation.